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    <title>Interactivity &#124; the D3 Graph Gallery</title>

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        <h1>Interactivity with d3.js</h1>
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        <br /><br />
        <p style="max-width: 700px; margin: auto">
          This section aims to describe how to turn your d3.js chart
          interactive. It describe how to add <u>tooltips</u>,
          <u>animations</u>, <u>hover</u> effects, <u>zoom</u> feature and more.
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        <div class="mySeryTitle">Tooltip</div>
        <hr />
        <p>
          D3.js allows to easily add a <u>tooltip</u> to any element of your
          chart. The idea is always the same: triggering a function when the
          user <code>mouseover</code>, <code>mousemove</code> or
          <code>mouseleave</code> the element. See the 3 examples below showing
          how to apply this technique to a
          <a href="graph/interactivity_tooltip.html">single circle</a>, how to
          customize the
          <a href="graph/interactivity_tooltip.html">tooltip content</a>, and
          how to apply it to <a href="graph/scatter_tooltip.html">data</a>.
        </p>
        <div id="portfolio-items" class="row">
          <div class="col-md-4 col-sm-6 portfolio-item">
            <a
              class="portfolio-link"
              href="graph/interactivity_tooltip.html#mostbasic"
            >
              <div class="portfolio-hover">
                <div class="portfolio-hover-content">
                  <p>Most basic</p>
                  <hr />
                  <p class="explanation_portfolio">
                    The most basic tooltip you can do in d3.js.<br />It just
                    create one tooltip for one circle
                  </p>
                </div>
              </div>
              <img class="img-fluid" src="img/graph/tooltip_basic.png" alt="" />
            </a>
          </div>
          <div class="col-md-4 col-sm-6 portfolio-item">
            <a
              class="portfolio-link"
              href="graph/interactivity_tooltip.html#customContent"
            >
              <div class="portfolio-hover">
                <div class="portfolio-hover-content">
                  <p>HTML in tooltip</p>
                  <hr />
                  <p class="explanation_portfolio">
                    Learn how to customize your tooltip: you can apply any html
                    code to it!
                  </p>
                </div>
              </div>
              <img class="img-fluid" src="img/graph/tooltip_html.png" alt="" />
            </a>
          </div>
          <div class="col-md-4 col-sm-6 portfolio-item">
            <a
              class="portfolio-link"
              href="graph/interactivity_tooltip.html#template"
            >
              <div class="portfolio-hover">
                <div class="portfolio-hover-content">
                  <p>Tooltip linked with data</p>
                  <hr />
                  <p class="explanation_portfolio">
                    Tooltip is different for each datapoint, customized, and
                    element style are modified when hovered.
                  </p>
                </div>
              </div>
              <img
                class="img-fluid"
                src="img/graph/heatmap_tooltip.gif"
                alt=""
              />
            </a>
          </div>
        </div>

        <br /><br />
        <div class="mySeryTitle">Brushing</div>
        <hr />
        <p>
          A post on the basic of <u>brushing</u> with d3.js. It starts by very
          <a href="graph/interactivity_brush.html">basic use</a> of the
          <code>d3.brush()</code> function: just initializing the functionality.
          Then, it explains how to
          <a href="graph/interactivity_brush.html#realgraph"
            >trigger a function</a
          >
          to perform a change on the selected points. Lastly, it describes how
          to
          <a href="graph/interactivity_brush.html#brushingforzoom"
            >smoothly zoom</a
          >
          on the selected area.
        </p>
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            <a class="portfolio-link" href="graph/interactivity_brush.html">
              <div class="portfolio-hover">
                <div class="portfolio-hover-content">
                  <p>Create your first brush</p>
                  <hr />
                  <p class="explanation_portfolio">
                    A very basic example showing how to initialize a brush area
                    with d3.brush.
                  </p>
                </div>
              </div>
              <img
                class="img-fluid"
                src="img/graph/interactivity_brushInitialize.png"
                alt=""
              />
            </a>
          </div>
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              class="portfolio-link"
              href="graph/interactivity_brush.html#realgraph"
            >
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                <div class="portfolio-hover-content">
                  <p>Trigger a function</p>
                  <hr />
                  <p class="explanation_portfolio">
                    How to get the brush coordinates and apply a function to the
                    points in the area.
                  </p>
                </div>
              </div>
              <img
                class="img-fluid"
                src="img/graph/interactivity_brushTrigger.gif"
                alt=""
              />
            </a>
          </div>
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              href="graph/interactivity_brush.html#brushingforzoom"
            >
              <div class="portfolio-hover">
                <div class="portfolio-hover-content">
                  <p>Brushing for zooming</p>
                  <hr />
                  <p class="explanation_portfolio">
                    How to zoom on the brushed area with a smooth transition.
                  </p>
                </div>
              </div>
              <img
                class="img-fluid"
                src="img/graph/interactivity_brushZoom.gif"
                alt=""
              />
            </a>
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        <br /><br />
        <div class="mySeryTitle">Buttons</div>
        <hr />
        <p>
          A post on buttons: what are the different types, how to add them using
          html, and how to connect them with the chart to trigger transition and
          animation.
        </p>
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                <div class="portfolio-hover-content">
                  <p>HTML button types</p>
                  <hr />
                  <p class="explanation_portfolio">
                    HTML natively offers different types of button: here is a
                    description of them with the associated code.
                  </p>
                </div>
              </div>
              <img
                class="img-fluid"
                src="img/graph/interactivity_button.png"
                alt=""
              />
            </a>
          </div>
        </div>

        <br /><br />
        <div class="mySeryTitle">Zooming</div>
        <hr />
        <p>
          A post on the basic of <u>zooming</u> with d3.js. It starts with a
          very <a href="graph/interactivity_zoom.html">basic use</a> of the
          <code>d3.zoom()</code> function: just applied on a single circle.
          Then, it explains how to
          <a href="graph/interactivity_zoom.html#axisZoom"
            >trigger a function</a
          >
          that update axis. Lastly, it shows that
          <a href="graph/interactivity_zoom.html#brushingforzoom">brushing</a>
          can be used for zooming as well.
        </p>
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            <a class="portfolio-link" href="graph/interactivity_zoom.html">
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                <div class="portfolio-hover-content">
                  <p>Most basic zoom</p>
                  <hr />
                  <p class="explanation_portfolio">
                    A very basic example showing how to initialize a zoom area
                    with d3.zoom.
                  </p>
                </div>
              </div>
              <img
                class="img-fluid"
                src="img/graph/interactivity_zoomBasic.gif"
                alt=""
              />
            </a>
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              class="portfolio-link"
              href="graph/interactivity_zoom.html#axisZoom"
            >
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                <div class="portfolio-hover-content">
                  <p>Update axis and element position</p>
                  <hr />
                  <p class="explanation_portfolio">
                    An example on a real scatterplot to show how to update axis
                    and elements.
                  </p>
                </div>
              </div>
              <img
                class="img-fluid"
                src="img/graph/interactivity_zoomAxis.gif"
                alt=""
              />
            </a>
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              href="graph/interactivity_zoom.html#brushingforzoom"
            >
              <div class="portfolio-hover">
                <div class="portfolio-hover-content">
                  <p>Brushing for zooming</p>
                  <hr />
                  <p class="explanation_portfolio">
                    How to zoom on the brushed area with a smooth transition.
                  </p>
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              </div>
              <img
                class="img-fluid"
                src="img/graph/interactivity_brushZoom.gif"
                alt=""
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            </a>
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        <br /><br />
        <div class="mySeryTitle">Transition</div>
        <hr />
        <p>
          <u>Transition</u> is where the magic of D3 takes place. Here you will
          find a few examples based on a single element to understand the basic
          mechanism. A few examples based on a real chart are then available to
          illustrate the process.
        </p>
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              class="portfolio-link"
              href="graph/interactivity_transition.html"
            >
              <div class="portfolio-hover">
                <div class="portfolio-hover-content">
                  <p>Most basic</p>
                  <hr />
                  <p class="explanation_portfolio">
                    The most basic transition you can do in d3.js.<br />It just
                    modify the width attribute of a div using d3.js, keeping
                    only the core code.
                  </p>
                </div>
              </div>
              <img
                class="img-fluid"
                src="img/graph/transition_basic.gif"
                alt=""
              />
            </a>
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              href="graph/interactivity_transition.html"
            >
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                  <p>Pipe several transition</p>
                  <hr />
                  <p class="explanation_portfolio">
                    Run several transitions one after another. Involves
                    different attributes like color and width.
                  </p>
                </div>
              </div>
              <img
                class="img-fluid"
                src="img/graph/transition_pipe.gif"
                alt=""
              />
            </a>
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              class="portfolio-link"
              href="graph/interactivity_transition.html"
            >
              <div class="portfolio-hover">
                <div class="portfolio-hover-content">
                  <p>Progressive transition</p>
                  <hr />
                  <p class="explanation_portfolio">
                    This example applies a different <code>delay</code> to each
                    element. It gives a progressive transition where elements
                    start moving one by one.
                  </p>
                </div>
              </div>
              <img
                class="img-fluid"
                src="img/graph/transition_delay.gif"
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